MATLAB: I want from user to give two equation then i want to devition this two equation but it errors.

equationinput

syms s
num=input('please enter the numerator:','s')
den=please enter denominator:','s')
T=num/den

Best Answer

Do not use the 's' option of input() for this particular situation.

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MATLAB: I want to use inverse laplace with tf function. How to do it? I take an error in matlab when ı use code like below.

Try this:

A=[-2 0 ; 0 -1]
B=[1;2]
C=[1 1]
D=0;
P=ss(A,B,C,D)
syms s t 
F=tf(P)
num = poly2sym(F.Numerator, s)
den = poly2sym(F.Denominator, s)
f(t) = ilaplace(num/den)
figure
fplot(f, [0,10])
grid

producing:

num =
3*s + 5
 
den =
s^2 + 3*s + 2
 
f(t) =
2*exp(-t) + exp(-2*t)

and the plot.

MATLAB: Extract num and den in symbolic expression.

Use the sym2poly funciton:

syms a b c s 
num = 1*s^2 + 2*s + 3;
n = sym2poly(num)
n = 
     1     2     3

Best Answer

Related Solutions

MATLAB: I want to use inverse laplace with tf function. How to do it? I take an error in matlab when ı use code like below.

MATLAB: Extract num and den in symbolic expression.

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